Pump and coating device

Abstract

According to one embodiment, a pump includes a first chamber configured to store a first fluid. The pump includes a second chamber configured to store a second fluid, the second chamber being positioned on a side of the first chamber. Volume of a space of the second chamber configured to store the second fluid is variable. The pump includes an elongated member having a first end portion and a second end portion, the first end portion provided in the second chamber and the second end portion provided in the first chamber.

What is claimed is: 
     
       1. A pump comprising:
 a first chamber configured to store a first fluid; 
 a second chamber configured to store a second fluid, the second chamber being positioned on a side of the first chamber and wherein a volume of a space of the second chamber configured to store the second fluid is variable; and 
 an elongated member having a first end portion and a second end portion, the first end portion provided in the second chamber and the second end portion provided in the first chamber; 
 wherein the second chamber is opposite to a side from which the first fluid is discharged; 
 wherein the first fluid and the second fluid is different; 
 wherein the second fluid is a cleaning fluid; and 
 wherein at least one end portion of the second chamber, provided on a side opposite the second chamber from the first chamber, is movable in a direction along which the first chamber and the second chamber are aligned. 
 
     
     
       2. The pump according to  claim 1 , wherein
 the second chamber is expandable in the direction along which the first chamber and the second chamber are aligned, and 
 the elongated member is movable in the direction along which the first chamber and the second chamber are aligned. 
 
     
     
       3. The pump according to  claim 1 , further comprising:
 a pressure controller configured to control a pressure in the space of the second chamber, wherein 
 the pressure controller configured to change the volume of the space by controlling the pressure of the space. 
 
     
     
       4. The pump according to  claim 1 , wherein the elongated member is not exposed to outside air. 
     
     
       5. A pump, comprising:
 a first chamber configured to store a first fluid; 
 a second chamber configured to store a second fluid, the second chamber being positioned on a side of the first chamber and wherein a volume of a space of the second chamber configured to store the second fluid is variable; 
 an elongated member having a first end portion and a second end portion, the first end portion provided in the second chamber and the second end portion provided in the first chamber; and 
 a driver configured to move at least one end portion of the second chamber in a direction along which the first chamber and the second chamber are aligned; 
 wherein the second chamber is opposite to a side from which the first fluid is discharged; 
 wherein the first fluid and the second fluid is different; 
 wherein the second fluid is a cleaning fluid. 
 
     
     
       6. The pump according to  claim 5 , wherein the second chamber is expandable in the direction along which the first chamber and the second chamber are aligned, and the elongated member is movable in the direction along which the first chamber and the second chamber are aligned. 
     
     
       7. The pump according to  claim 5 , further comprising:
 a pressure controller configured to control a pressure in the space of the second chamber, wherein 
 the pressure controller configured to change the volume of the space by controlling the pressure of the space. 
 
     
     
       8. The pump according to  claim 5 , wherein the elongated member is not exposed to outside air. 
     
     
       9. A coating device comprising:
 a pump according to  claim 1 ; and 
 a nozzle connected to an opening of the pump that discharges the first fluid. 
 
     
     
       10. A coating device comprising:
 a pump according to  claim 5 ; and 
 a nozzle connected to an opening of the pump that discharges the first fluid.